The failure of a team of experts to find DNA on bloodstained garments has dashed hopes for the retrial of a man sentenced to death for a 1966 quadruple murder.

The experts said Thursday they were unable to detect DNA on the clothes reportedly worn by Iwao Hakamada, 64, when he allegedly killed four people in 1966.

Supporters of a retrial had hoped that the DNA test would prove their theory that the garments had been planted by police as false evidence.